Relay

Abstract

Relay (1) comprising: a main contact (16); an auxiliary contact (17) enclosing an auxiliary contact point and opening and closing in accordance with the opening and closing of the main contact (16), and carrying a current which is less than the current which flows through the main contact (16); a drive element (12) configured to generate a driving force for opening and closing the main contact (16); a movable element (13) which operates by the driving force of the drive element (12); a contact section arranged to come into contact with the movable element (13); and a wall positioned to shield at least part of a space between the auxiliary contact point and the contact section.

Description

TECHNICAL FIELDThe present invention relates to a relay.PRIOR ARTOf the relays, some include an auxiliary contact point and a main contact, the auxiliary contact point being opened and closed in accordance with the opening and closing of the main contact. For example, in the relay described in Patent Document 1, a movable frame is driven by electromagnetic force of an electromagnet. While a main contact is opened and closed in accordance with the operation of the movable frame, an auxiliary contact is opened and closed. The detection of an open and closed state of the auxiliary contact enables the detection of an open and closed state of the main contact.Patent Document 2 also discloses a relay including an auxiliary contact besides a main contact. Further, the relay also includes an electromagnet which exerts an electromagnetic force on a movable member and thus causes simultaneous opening and closing of the main and auxiliary contacts.Other prior art related to electromagnetic relays is disclosed by Patent Documents 3 and 4.PRIOR ART DOCUMENTPATENT DOCUMENTPatent Document 1: Japanese Unexamined Patent Publication No. 2007-265810Patent Document 2: JP S55-34 382 UPatent Document 3: US 2009 / 0 033 446 A1Patent Document 4: DE 10 2012 207 589 B3SUMMARY OF THE INVENTIONPROBLEM TO BE SOLVED BY THE INVENTIONAs described above, the relay is provided with a movable member which is operated by a driving member such as an electromagnet or the like to open and close the main contact. The movable member moves by a force from the driving member and comes into contact with a member provided around the movable member. By the contact with the other member, small amounts of abrasion powder are generated around the movable member.In this connection, the main contact opens and closes the flow of relatively high current. Thus, even if small amounts of abrasion powder are produced, their influence does not pose a great problem. However, unlike the main contact, the auxiliary contact opens and closes the flow of a small current. As a result, the auxiliary contact is also liable to small amounts of abrasion powder, resulting in the problem of deterioration of the contact reliability of the auxiliary contact.It is an object of the present invention to provide a relay which can improve the touch reliability of an auxiliary contact.MEANS FOR ACHIEVING THE OBJECTA relay according to an aspect of the present invention is provided with a main contact, an auxiliary contact, a driving member, a movable member, a touch portion, and a wall. The auxiliary contact includes an auxiliary contact point and is opened and closed in accordance with the opening and closing of the main contact. In the auxiliary contact, a current smaller than the current flowing through the main contact flows. The driving member generates a driving force for opening and closing the main contact. The movable member operates by the driving force of the driving member. The contact portion is disposed to come into contact with the movable member. The wall is positioned to shield at least a portion of the space between the auxiliary contact point and the touch portion.In the relay according to the present aspect, the wall is positioned to shield at least a part of the space between the touch portion and the auxiliary contact point. The contact portion may be a source of generation of abrasion powder due to the contact with the movable member, and the auxiliary contact point is vulnerable to the abrasion powder. Thus, even when an abrasion powder is generated in the contact portion, the abrasion powder can be prevented from reaching from the contact portion to the auxiliary contact point. In other words, the wall is disposed at a position that is in the same space as the contact portion and the auxiliary contact point, and prevents powder dust such as abrasion powder generated in the contact portion from reaching the auxiliary contact point. Thereby, it is possible to improve the contact reliability of the auxiliary contact.The auxiliary contact may include a first auxiliary touch part and a second auxiliary touch part arranged opposite to each other. The wall may be disposed on the first auxiliary touch part and / or the second auxiliary touch part.The wall may be disposed to cover the space between the first auxiliary touch part and the second auxiliary touch part.The auxiliary contact point may include a first auxiliary contact point adapted to the first auxiliary touch part and a second auxiliary contact point adapted to the second auxiliary touch part. The wall may be disposed to oppose the first auxiliary contact point and the second auxiliary contact point.The wall may include a first wall and a second wall. The first wall may cover the space between the first auxiliary touch part and the second auxiliary touch part from one direction. The second wall may cover the space between the first auxiliary touch part and the second auxiliary touch part from a direction opposite to the first wall.The first wall may be disposed on the first auxiliary touch part. The second wall may be disposed on the second auxiliary touch part.Both the first wall and the second wall may be provided on the first auxiliary touch part or the second auxiliary touch part.The wall may be provided on only the first auxiliary touch part or only the second auxiliary touch part. The wall may cover the space between the first auxiliary touch part and the second auxiliary touch part from a lateral side.The wall may cover the space between the first auxiliary touch part and the second auxiliary touch part from the tip sides of the first auxiliary touch part and the second auxiliary touch part.The driving member may include a coil configured to generate electromagnetic force as a driving force. The contact portion may be provided in the form of a yoke connected to the coil. The movable member may include an armature that operates by the electromagnetic force.The contact portion and the movable member may be disposed between the driving member and the auxiliary contact.The relay may be further provided with a link configured to transmit the operation of the movable member to the main contact. The auxiliary contact can be opened and closed by operating the connection.The driving member, the movable member, and the link may be arranged side by side in this order in a predetermined first direction. The link may extend in a second direction vertical to the first direction. The connection may include a first end connected to the main contact and a second end opposite to the first end in the second direction. The auxiliary contact may be disposed to be opposed to the second end in the second direction and the movable member in the first direction.The relay may be further provided with a base configured to support the auxiliary contact. The wall may be disposed on the base.The relay may be further provided with a base configured to support the auxiliary contact and a housing set over the base. The wall may be disposed on the housing.The relay may be further provided with a base and a support member configured to rotatably support the movable member. The movable member may be disposed between the base and the support member in a direction of a rotation axis line of the movable member. The wall may be arranged on the support element.The relay may be further provided with a link configured to transmit the operation of the movable member to the main contact. The wall may be disposed on the joint. The wall may be disposed on the movable member.The driving member may include a coil configured to generate electromagnetic force as a driving force. The movable member may include an armature that operates by the electromagnetic force. The contact portion may be disposed in the link configured to transmit the operation of the movable member to the main contact.EFFECT OF THE INVENTIONAccording to the present invention, it is possible to provide a relay that can improve the touch reliability of an auxiliary contact.BRIEF DESCRIPTION OF THE DRAWINGSFIG. 1 is a perspective view of a relay according to a first embodiment. FIG. 2 shows a plan view of the relay in a reset state. FIG. 3 is a plan view of the relay in a set state. FIG. 4 is an enlarged view of FIG. 2. FIG. 5 is an enlarged view of FIG. 3. FIG. 6 shows a perspective view of an auxiliary contact. FIG. 7 shows a plan view of an auxiliary contact. FIG. 8 is a perspective view of the relay. FIG. 9 is a plan view showing an auxiliary contact according to a modified example of the first embodiment.FIGS. 10(A) and 10(B) are plan views each showing an auxiliary contact according to a modified example of a second embodiment.FIGS. 11(A) to 11(D) are plan views each showing an auxiliary contact according to a third embodiment.FIGS. 12(A) and 12(B) are side views each showing an auxiliary contact according to a fourth embodiment. FIG. 13 is a plan view of a relay according to a fifth embodiment. FIG. 14 is a cross-sectional view taken along line A-A of FIG. 13. FIG. 15 is a cross-sectional view of a relay according to a sixth embodiment. FIG. 16 is a cross-sectional view of a relay according to a seventh embodiment. FIG. 17 is a plan view of a relay according to an eighth embodiment. FIG. 18 is a plan view of the relay according to a modified example of the eighth embodiment. FIG. 19 is a plan view of a relay according to a ninth embodiment. FIG. 20 is a plan view showing an auxiliary contact according to the other embodiment.EMBODIMENTS OF THE INVENTIONHereinafter, relays according to the embodiments will be described with reference to the drawings. FIG. 1 is a perspective view of a relay 1 according to a first embodiment. FIGS. 2 and 3 are plan views of the relay 1 according to the first embodiment. As illustrated in FIG. 1, the relay 1 is provided with a base 11, a driving member 12, a movable member 13, a supporting member 14, a link 15, a main contact 16, and an auxiliary contact 17 (see FIGS. 2 and 3 ). In Figs. 2 and 3, the support member 14 has been omitted for better understanding of the drawings.In the embodiment, the direction indicated by the x-axis in FIG. 1 is referred to as a first direction. The direction indicated by the y-axis is referred to as a second direction. Further, the direction indicated by the z-axis is referred to as "upward".The base 11 houses the driving member 12, the movable member 13, the link 15, the main contact 16, and the auxiliary contact 17. a housing 18 is fitted onto the base 11 (see FIG. 14 ). In Figs. 1 to 3, the housing 18 is omitted for better understanding of the drawings.As illustrated in FIGS. 2 and 3, the base 11 includes a first bracket 111 and a second bracket 112. The first bracket 111 and the second bracket 112 are arranged side by side in the second direction (y). A partition wall 113 partitions the first bracket 111 and the second bracket 112. The first holder 111 houses the main contact 16. the second holder 112 houses the auxiliary contact 17. moreover, the second holder 112 houses the driving member 12, the movable member 13, and the supporting member 14.The driving member 12 generates a driving force for opening and closing the main contact 16. As illustrated in FIG. 2, the driving member 12 includes a coil 21, a roller 22, a first yoke 23, and a second yoke 24. The central axis of the coil 21 extends in the second direction (y). An unillustrated iron core is inserted into the roller 22. The first yoke 23 is connected to one end of the iron core, and the second yoke 24 is connected to the other end of the iron core.The movable member 13 is rotatably supported with respect to the base 11. The movable element 13 operates by the electromagnetic force from the driving member 12, and the movable element 13 is disposed between the driving member 12 and the auxiliary contact 17. The movable member 13 is disposed between the first yoke 23 and the second yoke 24. The movable member 13 includes a first armature 25, a second armature 26, a permanent magnet 27, and a movable housing 28. The base 11 rotatably supports the movable housing 28 about a rotation shaft 281. The movable housing 28 includes a connector 282. The connecting piece 282 protrudes in the direction of the connection 15.The first anchor 25 includes a first end 251 and a second end 252. The second armature 26 includes a third end 261 and a fourth end 262. The first end 251 and the third end 261 project from the movable housing 28 in the same direction. The second end 252 and the fourth end 262 project from the movable housing 28 in the direction opposite to the first end 251 and the third end 261.FIG. 4 is an enlarged view of FIG. 2, FIG. 5 is an enlarged view of FIG. 3, the second yoke 24 includes a first contact portion 241 and a second contact portion 242. As illustrated in FIG. 4, the first contact portion 241 comes into contact with the fourth end 262 of the second armature 26. As illustrated in FIG. 5, the second contact portion 242 comes into contact with the second end 252 of the first armature 25. the first contact portion 241 and the second contact portion 242 are disposed between the driving member 12 and the auxiliary contact 17.The first yoke 23 includes a third contact portion 231 and a fourth contact portion 232. As illustrated in FIG. 4, in the relay 1 in the reset state, the third touch portion 231 contacts the first end 251 of the first armature 25; as illustrated in FIG. 5, in the relay 1 in the set state, the fourth touch portion 232 contacts the third end 261 of the second armature 26; the third touch portion 231 and the fourth touch portion 232 are disposed between the movable member 13 and the partition wall 113.The support member 14 shown in FIG. 1 rotatably supports the movable member 13, and the support member 14 is disposed above the movable member 13. The movable member 13 is disposed between the base 11 and the support member 14 in the direction of the rotation axis line of the movable member 13.As illustrated in FIGS. 2 and 3, the driving member 12, the movable member 13, and the link 15 are arranged side by side in this order in the first direction (x). The link 15 transmits the operation of the movable member 13 to the main contact 16. the link 15 extends in the second direction (y) vertically to the first direction (x). The joint 15 is disposed above the first bracket 111 and the second bracket 112. The link 15 connects the movable housing 28 and the movable contact part 31.The connection 15 includes a first end 151 and a second end 152. The second end 152 is arranged opposite to the first end 151 in the second direction (y). The first end 151 is connected to the main contact 16. A recess 153 is provided in the first end 151. The tip of the movable contact part 31 described later is disposed in the recess 153.The joint 15 is connected to the movable housing 28 at a portion between the first end 151 and the second end 152. In particular, the connection 15 has a hole 154, as shown in FIGS. 4 and 5. The tip of the connecting piece 282 of the movable member 13 is inserted into the hole 154 of the joint 15. The link 15 includes a first link contact portion 155 and a second link contact portion 156. The first connection contact portion 155 and the second connection contact portion 156 are provided on the inside of the hole 154 of the connector 15.As illustrated in FIG. 4, the first connection contact portion 155 is disposed to be in contact with the connector 282 when the relay 1 is in the reset state. As illustrated in FIG. 5, the second contact portion 156 is disposed to contact the connector 282 when the relay 1 is in the set state.As illustrated in FIGS. 2 and 3, the main contact 16 includes the movable touch part 31, a movable terminal contact 32, and a fixed terminal contact 33. The movable contact part 31 is connected to the movable terminal contact 32. The movable contact part 31 is connected to a movable contact 34. The fixed terminal contact 33 extends in the first direction (x). A fixed contact 35 is disposed opposite to the movable contact 34 in the second direction (y). The fixed terminal contact 33 is connected to the fixed contact 35.The auxiliary contact 17 is opened and closed in accordance with the opening and closing of the main contact 16. In the auxiliary contact 17, a current smaller than the current flowing in the main contact 16 flows. The auxiliary contact 17 is disposed so as to oppose the movable member 13 in the first direction (x). The auxiliary contact 17 is disposed so as to oppose the connection 15 in the second direction (y). The base 11 supports the auxiliary contact 17. FIG. 6 is a perspective view of the auxiliary contact 17. FIG. 7 is a plan view of the auxiliary contact 17.As illustrated in FIGS. 6 and 7, the auxiliary contact 17 includes a first auxiliary touch part 41 and a second auxiliary touch part 42 that are disposed opposite to each other. The first auxiliary touch part 41 and the second auxiliary touch part 42 are opposed to each other in the second direction (y). The second auxiliary touch part 42 is disposed between the first auxiliary touch part 41 and the link 15 in the second direction (y). As illustrated in FIG. 6, an auxiliary base 114 supports the first auxiliary touch part 41 and the second auxiliary touch part 42. The first auxiliary touch part 41 includes a first auxiliary terminal 411. The second auxiliary touch part 42 includes a second auxiliary terminal 421. As illustrated in FIG. 8, the first auxiliary terminal 411 and the second auxiliary terminal 421 protrude outward from the auxiliary base 114.As illustrated in FIG. 7, a first auxiliary contact point 43 is mounted on the first auxiliary contact part 41. A second auxiliary contact point 44 is mounted to the second auxiliary contact part 42.As illustrated in FIG. 6, the second auxiliary touch part 42 extends beyond the first auxiliary touch part 41. The upper portion of the second auxiliary touch part 42 is located above the first auxiliary touch part 41 and faces the second end 152 of the link 15 in the second direction (y).The second auxiliary touch part 42 includes a pressing portion 422 at the upper portion. By pressing the pressing portion 422 of the second auxiliary touch part 42 by the second end 152 of the link 15, the second auxiliary touch part 42 is bent in a direction to approach the first auxiliary touch part 41 as illustrated in FIG. 4. This brings the second auxiliary contact point 44 into contact with the first auxiliary contact point 43. By separating the second end 152 of the link 15 from the pressing portion 422 of the second auxiliary contact part 42, the second auxiliary contact part 42 is restored to its original state by a spring force of the second auxiliary contact part 42 as illustrated in FIG. 5. This disconnects the second auxiliary contact point 44 from the first auxiliary contact point 43. In this way, the auxiliary contact 17 is opened and closed by operation of the link 15.As illustrated in FIGS. 6 and 7, a first wall 51 is disposed on the first auxiliary contact part 41. A second wall 52 is disposed on the second auxiliary touch part 42. The first wall 51 and the second wall 52 are disposed so as to be opposed to the first auxiliary contact point 43 and the second auxiliary contact point 44. That is, the first wall 51 and the second wall 52 are disposed at approximately the same height as the first auxiliary contact point 43 and the second auxiliary contact point 44.The first wall 51 and the second wall 52 are located below the pressing portion 422.The first wall 51 and the second wall 52 are arranged to cover the space between the first auxiliary touch part 41 and the second auxiliary touch part 42. The first wall 51 covers the space between the first auxiliary touch part 41 and the second auxiliary touch part 42 from a lateral side. The second wall 52 covers the space between the first auxiliary touch part 41 and the second auxiliary touch part 42 from the other lateral side. That is, the second wall 52 covers the space between the first auxiliary touch part 41 and the second auxiliary touch part 42 from a direction opposite to the first wall 51.As illustrated in FIGS. 4 and 5, the first wall 51 is positioned to shield a space connecting between the first and second auxiliary contact points 43, 44 and the first contact portion 241 of the second yoke 24. The second wall 52 is positioned to shield a space connecting between the first and second auxiliary contact points 43, 44 and the first connection contact portion 155 of the connector 15.As illustrated in FIG. 7, the first wall 51 extends from the first auxiliary touch part 41 toward the second auxiliary touch part 42 to a position beyond the second auxiliary touch part 42. The second wall 52 extends from the second auxiliary touch part 42 toward the first auxiliary touch part 41 to a position beyond the first auxiliary touch part 41.The first wall 51 is integrally formed with the first auxiliary contact part 41. Specifically, the first auxiliary contact part 41 and the first wall 51 are formed of a unitary flat member, and a part of the flat member is bent to form the first wall 51. The second wall 52 is integrally formed with the second auxiliary contact part 42. Specifically, the second auxiliary contact part 42 and the second wall 52 are formed of a unitary flat member, and a part of the flat member is bent to form the second wall 52. However, the first wall 51 is not necessarily integrally formed with the first auxiliary contact part 41, but may be separately formed provided that it is positioned so as to shield the space connecting between the first and second auxiliary contact points 43, 44 and the first contact portion 241 of the second yoke 24. The second wall 52 is not necessarily integrally formed, but may be formed separately from the second auxiliary contact part 42, provided that it is positioned so as to shield the space connecting between the first and second auxiliary contact points 43, 44 and the first connection contact portion 155 of the connector 15.The operation of the relay 1 will be described below. In the reset state illustrated in FIGS. 2 and 4, the first end 251 of the first armature 25 contacts the first yoke 23, and the second end 252 is separated from the second yoke 24. The fourth end 262 of the second armature 26 contacts the second yoke 24, and the third end 261 is separated from the first yoke 23. The movable contact 34 is separated from the fixed contact 35. The link 282 contacts the first link contact portion 155 of the link 15, and the link 15 presses the second auxiliary contact piece 42.When a voltage is applied to the coil 21 in a predetermined direction, an electromagnetic force is generated that rotates the movable element 13 in a forward direction (clockwise in FIG. 2 ). The movable member 13 thereby rotates in the forward direction. Upon rotation of the movable member 13 in the forward direction, the link 282 comes into contact with and presses against the second link contact portion 156 of the link 15, and the link 15 thereby moves in a leftward direction in FIG. 2, thereby moving the tip of the movable contact part 31 in the leftward direction in FIG. 2, and simultaneously therewith the movable contact 34 moves in a direction to approach the fixed contact 35. As a result, the movable contact 34 contacts the fixed contact 35, thereby switching the relay 1 from the reset state shown in FIG. 2 to the set state shown in FIG. 3. At the same time, when the joint 15 disengages from the second auxiliary touch part 42, the second auxiliary contact point 44 is separated from the first auxiliary contact point 43.As illustrated in FIGS. 3 and 5, in the set state, the first end 251 of the first armature 25 is separated from the first yoke 23, and the second end 252 contacts the second yoke 24. the fourth end 262 of the second armature 26 is separated from the second yoke 24, and the third end 261 contacts the first yoke 23.Next, when the coil 21 is energized in a direction opposite to the above predetermined direction, an electromagnetic force is generated by which the movable member 13 is rotated in the reverse direction to the above forward direction (counterclockwise in FIG. 3 ). The movable member 13 thereby rotates in the rearward direction. After the movable member 13 rotates in the rearward direction, the link 282 comes into contact with and presses against the first link contact portion 155 of the link 15, and the link 15 thereby moves in a rightward direction in FIG. 3.As a result, the tip of the movable contact part 31 moves in the rightward direction in FIG. 3, and at the same time, the movable contact 34 moves in a direction to be separated from the fixed contact 35. This leads to disconnection of the movable contact 34 from the fixed contact 35, and thereby the relay 1 is restored to the reset state shown in FIG. 2 from the set state shown in FIG. 3. At the same time, when the joint 15 presses the second auxiliary contact part 42, the second auxiliary contact point 44 contacts the first auxiliary contact point 43.In the relay 1 according to the above-described embodiment, the first wall 51 and the second wall 52 cover both lateral sides of the space in which the first auxiliary contact point 43 and the second auxiliary contact point 44 are disposed. Thus, even when abrasion powder is generated in the first to fourth contact portions 241, 242, 231, 232 or the first and second connection contact portions 155, 156, the abrasion powder can be prevented from reaching the auxiliary contact 17 from the first contact portion 241.Specifically, the first wall 51 is provided between the auxiliary contact 17 and the contact portion (the first contact portion 241) between the second yoke 24 and the movable member 13 disposed adjacent to the auxiliary contact 17. Thus, even when an abrasion powder is generated in the first contact portion 241, the abrasion powder can be prevented from reaching the auxiliary contact 17 of one of the contact portions.Further, the second wall 52 is provided between the auxiliary contact 17 and the contact portion (the first connection contact portion 155) between the connection 15 and the movable member 13 disposed adjacent to the auxiliary contact 17. Thus, even when an abrasion powder is generated in the first connection contact portion 155, the abrasion powder can be prevented from reaching the auxiliary contact 17 from the first connection contact portion 155.As described above, in the relay 1 according to this embodiment, abrasion powder can be prevented from reaching the auxiliary contact 17. This enables the abrasion powder to be reduced in adhesion to the first and second auxiliary contact points 43, 44.FIG. 9 is a plan view showing the auxiliary contact 17 according to a modified example of the first embodiment. As illustrated in FIG. 9, the first wall 51 may be disposed on the second auxiliary touch part 42. The second wall 52 may be provided on the first auxiliary touch part 41.FIGS. 10(A) and 10(B) are plan views each showing an auxiliary contact 17 according to a second embodiment. As illustrated in FIGS. 10(A) and 10(B), both the first wall 51 and the second wall 52 may be provided on the first auxiliary touch part 41 or the second auxiliary touch part 42. That is, as illustrated in FIG. 10(A), both the first wall 51 and the second wall 52 may be disposed on the second auxiliary touch part 42. Alternatively, as illustrated in FIG. 10(B), both the first wall 51 and the second wall 52 may be disposed on the first auxiliary touch part 41.FIGS. 11(A) to 11(D) each illustrate an auxiliary contact 17 according to a third embodiment in plan view. The wall may be disposed on only one of the first auxiliary touch part 41 and the second auxiliary touch part 42 and cover the space between the first auxiliary touch part 41 and the second auxiliary touch part 42 from a lateral side. That is, as illustrated in FIG. 11(A), the wall 51 may be provided on the second auxiliary touch part 42, and the second wall 52 may not be provided. Alternatively, as illustrated in FIG. 11(B), the first wall 51 may be provided on the first auxiliary touch part 41, and the second wall 52 may not be provided. Alternatively, as illustrated in FIG. 11(C), the second wall 52 may be provided on the second auxiliary touch part 42, and the first wall 51 may not be provided. Alternatively, as illustrated in FIG. 11(D), the second wall 52 may be provided on the first auxiliary touch part 41, and the first wall 51 may not be provided.FIGS. 12(A) and 12(B) are side views each showing an auxiliary contact 17 according to a fourth embodiment. As illustrated in FIGS. 12(A) and 12(B), a wall 53 may cover the space between the first auxiliary touch part 41 and the second auxiliary touch part 42 from the tip sides of the first auxiliary touch part 41 and the second auxiliary touch part 42. That is, as illustrated in FIG. 12(A), the wall 53 may be provided on the second auxiliary touch part 42, the wall 53 covering the space between the first auxiliary touch part 41 and the second auxiliary touch part 42 from the tip sides of the first auxiliary touch part 41 and the second auxiliary touch part 42. Alternatively, as illustrated in FIG. 12(B), the wall 53 may be provided on the first auxiliary touch part 41, the wall 53 covering the space between the first auxiliary touch part 41 and the second auxiliary touch part 42 from the tip sides of the first auxiliary touch part 41 and the second auxiliary touch part 42.FIG. 13 is a plan view of a relay 1 according to a fifth embodiment. As illustrated in FIG. 13, a wall 54 may be disposed in a portion other than the auxiliary contact 17.Fig. 14 is a cross section taken along line A-A of Fig. 13, and as shown in Fig. 14, the wall 54 may be provided on a supporting member 14. In this case, the wall 54 is arranged to extend downward from the support member 14. Similar to the first wall 51 described above, the wall 54 is disposed between the first contact portion 241 and the auxiliary contact 17. Alternatively, the wall 54 may be located elsewhere.FIG. 15 is a cross-sectional view of a relay 1 according to a sixth embodiment. As illustrated in FIG. 15, a wall 55 may be provided on the base 11. In this case, the wall 55 is disposed to extend upward from the lower surface of the base 11. Alternatively, the wall 55 may be disposed to extend from the inner surface of the base 11. Similar to the first wall 51 described above, the wall 55 is disposed between the first contact portion 241 and the auxiliary contact 17. Alternatively, the wall 55 may be provided elsewhere.FIG. 16 is a cross-sectional view of a relay 1 according to a seventh embodiment. As shown in FIG. 16, a wall 56 may be provided on the housing 18 placed over the base 11. In this case, the wall 56 is arranged to extend downwardly from the housing 18. Similar to the first wall 51 described above, the wall 56 is disposed between the first contact portion 241 and the auxiliary contact 17. Alternatively, the wall 56 may be provided elsewhere.FIG. 17 is a plan view of a relay 1 according to an eighth embodiment. As shown in FIG. 17, a wall 57 may be provided on the joint 15. Similar to the first wall 51 described above, the wall 57 is disposed between the first contact portion 241 and the auxiliary contact 17. Alternatively, the wall 57 may be provided elsewhere.FIG. 18 is a plan view of a relay 1 according to a modified example of the eighth embodiment. As illustrated in FIG. 18, the first wall 51 and the second wall 52 may be provided on the joint 15. The first wall 51 is disposed between the first contact portion 241 and the auxiliary contact 17. The second wall 52 covers the space between the first auxiliary touch part 41 and the second auxiliary touch part 42 from a side opposite to the first wall 51.FIG. 19 is a plan view of a relay 1 according to a ninth embodiment. As illustrated in FIG. 19, a wall 58 may be provided on the movable member 13. More specifically, the wall 58 may be disposed on the movable housing 28. In this case, the wall 58 is provided so that the movable housing 28 extends laterally. Similar to the first wall 51 described above, the wall 58 is disposed between the first contact portion 241 and the auxiliary contact 17. Alternatively, the wall 58 may be provided elsewhere.Although an embodiment of the present invention has been described above, the present invention is not limited to the above embodiments, and a variety of modifications may be made within the scope that do not depart from the gist of the present invention.The structures of the main contact 16, the auxiliary contact 17, the driving member 12, the movable member 13, or the contact portion are not limited to the above-described positions, but may be changed. The positions of the walls 51 to 58 are not limited to the above-described structures, but may be changed accordingly. The shapes of the walls 51 to 58 are not limited to the shapes described above, but may be changed. For example, as illustrated in FIG. 20, the walls 51, 52 may each have a curved shape. Likewise, the other walls 53 to 58 may each have a curved shape. The number of the walls is not limited to one or two, but may be more than two.INDUSTRIAL APPLICABILITYAccording to the present invention, it is possible to provide a relay that can improve the touch reliability of an auxiliary contact.DESCRIPTION OF THE REFERENCE NUMERALS16 Main contact 17 Auxiliary contact 12 Driving member 13 Movable member 241 First contact portion 155 First connection contact portion 51 First wall 52 Second wall 53- 58 Wall 41 First auxiliary contact part 42 Second auxiliary contact part 43 First auxiliary contact point 44 Second auxiliary contact point 21 Coil 24 Second yoke 26 Second armature 15 Connection 11 Base 18 Housing 14 Support member

Claims

A relay (1) comprising: a main contact (16); an auxiliary contact (17) that includes an auxiliary contact point and is opened and closed in accordance with the opening and closing of the main contact (16), and in which a current flows, the current being smaller than the current flowing through the main contact (16); a driving member (12) configured to generate a driving force for opening and closing the main contact (16); a movable member (13) that operates by the driving force of the driving member (12); a contact portion that is arranged to come into contact with the movable member (13); and a wall that is positioned to shield at least a part of a space between the auxiliary contact point and the contact portion.The relay (1) according to claim 1, wherein the auxiliary contact (17) includes a first auxiliary touch part (41) and a second auxiliary touch part (42) that are arranged opposite to each other, and the wall is arranged on the first auxiliary touch part (41) and / or the second auxiliary touch part (42).The relay (1) according to claim 2, wherein the wall is arranged to cover the space between the first auxiliary touch part (41) and the second auxiliary touch part (42).The relay (1) according to claim 2 or 3, wherein the auxiliary contact point includes a first auxiliary contact point (43) fitted to the first auxiliary contact part (41) and a second auxiliary contact point (44) fitted to the second auxiliary contact part (42), and the wall is disposed to be opposed to the first auxiliary contact point (43) and the second auxiliary contact point (44)The relay (1) according to any one of claims 2 to 4, wherein the wall includes a first wall (51) and a second wall (52), the first wall (51) covers the space between the first auxiliary touch part (41) and the second auxiliary touch part (42) from a direction, and the second wall (52) covers the space between the first auxiliary touch part (41) and the second auxiliary touch part (42) from a direction opposite to the first wall (51).The relay (1) according to claim 5, wherein the first wall (51) is disposed on the first auxiliary touch part (41), and the second wall (52) is disposed on the second auxiliary touch part (42).The relay (1) according to claim 5, wherein each of the first wall (51) and the second wall (51) is disposed on the first auxiliary touch part (41) or the second auxiliary touch part (42).The relay (1) according to any one of claims 2 to 4, wherein the wall (51, 52) is disposed only on the first auxiliary touch part (41) or only on the second auxiliary touch part (42), and the wall (51, 52) covers the space between the first auxiliary touch part (41) and the second auxiliary touch part (41) from a lateral side.The relay (1) according to any one of claims 2 to 4, wherein the wall (53) covers the space between the first auxiliary touch part (41) and the second auxiliary touch part (41) from the tip sides of the first auxiliary touch part (41) and the second auxiliary touch part (42).The relay (1) according to any one of claims 1 to 9, wherein the driving member (12) includes a coil (21) configured to generate electromagnetic force as a driving force, the contact portion (231, 232, 241, 242) is provided in a yoke (23, 24) connected to the coil (21), and the movable member (13) includes an armature (25, 26) that operates by the electromagnetic force.The relay (1) according to claim 10, wherein the contact portion (231, 232, 241, 242) and the movable member (13) are disposed between the driving member (12) and the auxiliary contact (17).The relay (1) according to claim 10, further comprising a link (15) configured to transmit the operation of the movable member (13) to the main contact (16), wherein the auxiliary contact (17) is opened and closed by operation of the link (15).The relay (1) according to claim 11, wherein the driving member (12), the movable member (13), and the link (15) are arranged side by side in this order in a predetermined first direction, the link (15) extends in a second direction vertical to the first direction and includes a first end (151) connected to the main contact (16) and a second end (152) opposite to the first end (151) in the second direction, and the auxiliary contact (17) is arranged to be opposite to the second end (152) in the second direction and the movable member (13) in the first direction.The relay (1) according to any one of claims 1 to 4, further comprising a base (1) configured to support the auxiliary contact (17), the wall (55) being arranged on the base (11).The relay (1) according to any one of claims 1 to 4, further comprising a base (11) configured to support the auxiliary contact (17), and a housing (18) set over the base (11), wherein the wall (56) is disposed on the housing (18).The relay (1) according to any one of claims 1 to 4, further comprising a base (11) and a support member (14) configured to rotatably support the movable member (13), wherein the movable member (13) is disposed between the base (11) and the support member (14) in a direction of a rotation axis line of the movable member (13), and the wall (54) is disposed on the support member (14).Relay (1) according to any one of claims 1 to 4, further comprising a link (15) configured to transmit the operation of the movable element (13) to the main contact (16), the wall (57) being arranged on the link (15).Relay (1) according to any one of claims 1 to 4, wherein the wall (58) is arranged on the movable element (13).The relay (1) according to any one of claims 1 to 9, wherein the driving member (12) includes a coil (21) configured to generate electromagnetic force as a driving force, the movable member (13) includes an armature (25, 26) that operates by the electromagnetic force, and the contact portion (231, 232, 241, 242) is disposed in a link (15) configured to transmit the operation of the movable member (13) to the main contact (16).

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